======================== unified (from filesystem) ========================
                                         'bitrate'  '197.176'
                                        'duration'  '310'
                                          'artist'  'Bad Boys Blue'
                                     'text_people'  ''
                                         'release'  'I Love Disco Diamonds Collection Vol. 46'
                                           'title'  "Gimme Gimme Your Lovin' (Little Lady)"
                                           'quals'  ("['Q-HAP-4', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'pop', 'disco', 'eurodance', '80s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'electronic-we-disco or italo'
                                             'bpm'  '113.8'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'COMM::XXX'                                         'R&S Collection'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000000 00000000 0000000000000000 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'I Love Disco Diamonds Collection Vol. 46'
'TBPM' (BPM (beats per minute))                     '113.8'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-disco or italo'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         "Gimme Gimme Your Lovin' (Little Lady)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bad Boys Blue'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '4'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['dance', 'pop', 'disco', 'eurodance', '80s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.24 dB'
'TXXX:replaygain_track_peak'                        '0.492197'

========================== row from database ==========================
                                              'id'  1505079
                                            'path'  /data/Music/Bulk/00poprockelectronic-waves-disco/00disco-italo/Rose - The Best Italo Disco/(04) [Bad Boys Blue] Gimme Gimme Your Lovin_ (Little Lady).mp3
                                         'working'  None
                                         'bitrate'  197
                                    'duration_sec'  310
                                           'genre'  electronic-we-disco or italo
                                        'filesize'  7654253
                                           'mtime'  1620610504
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic waves disco 00disco italo Rose The Best Italo (04) [Bad Blue] Lovin_ electronic we disco or italo
                                      'tag_artist'  Bad Boys Blue
                                     'tag_release'  I Love Disco Diamonds Collection Vol. 46
                                       'tag_title'  Gimme Gimme Your Lovin' (Little Lady)
                                             'bpm'  113.8
                                    'search_title'  'gimme':1 'lady':7,8 'little':5,6 'lovin':3,4 'your':2
                                   'search_artist'  'bad':1 'blue':3 'boys':2
                                  'search_release'  '46':8 'collection':5 'diamonds':4 'disco':3 'i':1 'love':2 'vol':6,7
                                     'search_rest'  '00disco':4 '00poprockelectronic':1 '04':9,10 'bad':11,12 'best':8 'blue':13,14 'disco':3 'electronic':16 'italo':5 'lovin':15 'or':18 'rose':6 'the':7 'waves':2 'we':17
                                    'search_combo'  '00disco':23 '00poprockelectronic':20 '04':28,29 '46':19C 'bad':9B,30,31 'best':27 'blue':11B,32,33 'boys':10B 'collection':16C 'diamonds':15C 'disco':14C,22 'electronic':35 'gimme':1A 'i':12C 'italo':24 'lady':7A,8A 'little':5A,6A 'love':13C 'lovin':3A,4A,34 'or':37 'rose':25 'the':26 'vol':17C,18C 'waves':21 'we':36 'your':2A
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-1', 'q-other-2', 'Q-HAP-4', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['dance', 'pop', 'disco', 'eurodance', '80s']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620610503.9704309  (2021-05-10 03:35:03)
                             'size'  7654253